142 lines
4.6 KiB
C++
142 lines
4.6 KiB
C++
/*
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* Copyright 2010 Niels Kummerfeldt <niels.kummerfeldt@tu-harburg.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*/
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#include "gpxlayer.h"
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#include "mapwidget.h"
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#include "projection.h"
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#include <QtCore/QDateTime>
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#include <QtCore/QFile>
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#include <QtXml/QXmlStreamReader>
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GpxLayer::GpxLayer(MapWidget *map) :
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AbstractLayer(map)
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{
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}
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void GpxLayer::load(const QString &filename)
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{
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QFile file(filename);
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if (file.open(QIODevice::ReadOnly)) {
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QXmlStreamReader xml(&file);
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QPolygonF points;
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QList<float> elev;
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QList<int> time;
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QString tag, tag2;
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QString name;
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QPointF pos;
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while (!xml.atEnd()) {
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xml.readNext();
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if (xml.isStartElement()) {
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if (xml.name() == "trkpt") {
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tag = "trkpt";
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float lat = xml.attributes().value("lat").toString().toFloat();
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float lon = xml.attributes().value("lon").toString().toFloat();
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points << QPointF(Projection::lon2rawx(lon), Projection::lat2rawy(lat));
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} else if (xml.name() == "ele") {
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tag2 = "ele";
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} else if (xml.name() == "time") {
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tag2 = "time";
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} else if (xml.name() == "wpt") {
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tag = "wpt";
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float lat = xml.attributes().value("lat").toString().toFloat();
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float lon = xml.attributes().value("lon").toString().toFloat();
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pos = QPointF(lon, lat);
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} else if (xml.name() == "name") {
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tag2 = "name";
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} else if (xml.name() == "trk" ||
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xml.name() == "trkseg") {
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} else {
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tag2.clear();
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}
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} else if (xml.isEndElement()) {
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if (xml.name() == "trkseg") {
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if (!points.isEmpty()) {
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m_track << points;
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m_track << QPointF();
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}
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points.clear();
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elev.clear();
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time.clear();
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} else if (xml.name() == "wpt") {
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//addMarker(pos, name);
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name.clear();
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}
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} else if (xml.isCharacters() && !xml.isWhitespace()) {
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if (tag == "trkpt") {
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if (tag2 == "ele") {
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elev << xml.text().toString().toFloat();
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} else if (tag2 == "time") {
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QDateTime dt = QDateTime::fromString(xml.text().toString(), Qt::ISODate);
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time << dt.toTime_t();
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}
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} else if (tag == "wpt") {
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if (tag2 == "name") {
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name = xml.text().toString();
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}
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}
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}
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}
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zoom(0);
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}
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}
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void GpxLayer::zoom(int level)
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{
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if (m_track.count() > 1) {
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int scale = 1 << level;
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m_trackOnScreen.clear();
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m_trackOffset = map()->raw2screen(m_track.first().x(), m_track.first().y(), scale);
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m_trackOnScreen << QPoint(0, 0);
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for (int i = 1; i < m_track.count(); ++i) {
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QPointF p = m_track.at(i);
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if (!p.isNull()) {
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m_trackOnScreen << map()->raw2screen(p.x(), p.y(), scale) - m_trackOffset;
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} else {
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m_trackOnScreen << QPoint();
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}
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}
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}
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}
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void GpxLayer::pan(const QPoint &move)
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{
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m_trackOffset += move;
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}
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void GpxLayer::paint(QPainter *painter)
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{
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if (m_trackOnScreen.count() > 1) {
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QPoint p1, p2 = m_trackOnScreen.first();
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for (int i = 1; i < m_trackOnScreen.count(); ++i) {
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p1 = m_trackOnScreen.at(i);
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if (!p1.isNull()) {
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painter->drawLine(p1 + m_trackOffset, p2 + m_trackOffset);
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p2 = p1;
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}
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}
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}
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}
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